Malignant Transformation of a Well-organized Sacrococcygeal Fetiform Teratoma in a Newborn Male

Abstract

We report herein a case of a male newborn with a sacrococcygeal fetiform teratoma (FT). The baby presented with a large coccygeal teratoma. The preoperative diagnosis of FT was made by plain radiography, ultra- sonography and magnetic resonance imaging. The baby was successfully treated by complete excision and pelvic floor reconstruction. Postoperative follow-up was uneventful until the teratoma recurred 11 months later as a malignancy. After undergoing a second operative procedure accompanied by chemotherapy, he has been doing well for 18 months.

Keywords

• fetus-in-fetu
• teratoma
• sacrococcyx
• germ cell tumor
• yolk sac tumor